Patent US5840437A successfully refreshed from Google Patents.
Patent US3715149A successfully refreshed from Google Patents.
US3715149A
Expired / Lapsed
US
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Convertible sunshade and lens cap
Assignee: Bell and Howell Co
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Filing: 1971-04-16
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Granted: 1973-02-06
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Expires: 1991-04-16
Abstract
Abstract A CONVERTIBLE SUNSHADE AND LENS CAP DEVICE ADAPTED FOR PROTECTING A LENS IN A LENS MOUNT OF AN OPTICAL INSTRUMENT RESPECTIVELY FROM LIGHT RAYS OF EXTREME ANGLES DURING USE AND FROM DUST DURING STORAGE. THE DEVICE COMPRISES A TUBULAR SUNSHADE ADJUSTABLE TO CAUSE HINGED, PREFERABLY INTEGRAL, FLAP PORTIONS TO PIVOT BETWEEN OPEN AND CLOSED ORIENTATIONS.
Inventors
- 👤 S Freeland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 13:29
CPC Classifications
G; G03; G03B; G03B11/00; G03B11/04; G03B11/045; G03B11/041
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-02-06 | 1976-08-07 | 1977-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-06 | 1980-08-07 | 1981-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-06 | 1984-08-07 | 1985-02-06 | $7700.00 | Window Closed / Lapsed |